50420821864 has 16 divisors (see below), whose sum is σ = 108044618400. Its totient is φ = 21608923632.

The previous prime is 50420821861. The next prime is 50420821897. The reversal of 50420821864 is 46812802405.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (50420821861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450185854 + ... + 450185965.

It is an arithmetic number, because the mean of its divisors is an integer number (6752788650).

Almost surely, 2^50420821864 is an apocalyptic number.

It is an amenable number.

50420821864 is an abundant number, since it is smaller than the sum of its proper divisors (57623796536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50420821864 is a wasteful number, since it uses less digits than its factorization.

50420821864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900371832 (or 900371828 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The spelling of 50420821864 in words is "fifty billion, four hundred twenty million, eight hundred twenty-one thousand, eight hundred sixty-four".